<div dir="ltr">+1 from me. The "shadow copy" behavior was a tricky problem to explain. </div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Feb 18, 2016 at 5:09 PM, Kevin Ballard via swift-evolution <span dir="ltr"><<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On Tue, Feb 16, 2016, at 05:30 PM, Chris Lattner wrote:<br>
> * What is your evaluation of the proposal?<br>
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</span>+1. Seems like a good idea. Shadow copies of inout parameters are confusing.<br>
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> * Is the problem being addressed significant enough to warrant a change to Swift?<br>
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</span>Yes, it's a surprising edge case that can be hard to understand if you don't know what's going on.<br>
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> * Does this proposal fit well with the feel and direction of Swift?<br>
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</span>I think it's fairly neutral.<br>
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> * If you have you used other languages or libraries with a similar feature, how do you feel that this proposal compares to those?<br>
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</span>The only language that comes to mind that might have a similar situation is C++ with pass-by-ref parameters and C++11 lambdas, and I'm not quite sure how those interact. I assume that if you capture the parameter by-ref in the lambda, it'll capture the original reference, but in that case it would not be safe to have the lambda out-live the reference (i.e. there'd be no shadow copy made). But I've not actually researched this topic.<br>
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> * How much effort did you put into your review? A glance, a quick reading, or an in-depth study?<br>
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</span>A quick reading.<br>
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-Kevin Ballard<br>
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